"Interoperability is an important factor in the success of solutions that are based on Web Services and Service Oriented Architecture (SOA), along with other key factors such as contracts, loose coupling, and reuse. Interoperability is generally accomplished by developing your Web Services using the well-established guidelines for implementing Web Services and by following industry standards such as XML, WSDL, SOAP, and UDDI. However, just following Web Services standards and guidelines during the development phase of a project isn't sufficient to achieve interoperability."